Fatal error: Uncaught Error: Interface "Kreait\Firebase\Exception\DatabaseException" not found in D:\xampp\htdocs\vendor\kreait\firebase-php\src\Firebase\Exception\Database\PermissionDenied.php:10 Stack trace: #0 {main} thrown in D:\xampp\htdocs\vendor\kreait\firebase-php\src\Firebase\Exception\Database\PermissionDenied.php on line 10